update example API

docs/source/c8_changes.rst

@@ -55,7 +55,7 @@ Change list
                 return data + np.mean(trc["ra"]) + np.mean(trc["dec"])
 
 
-            def base_distortion(
+            def base_msc_l1_mbi_image_distortion(
                 input_file, output_file, rc: str = "/path/to/gaia_dr3.fits", **kwargs
             ) -> CsstResult:
                 """your docstring here"""